Analogy: Kitchen junk drawer Animal-like Plant-like In General Mostly aquatic life Usually unicellular – Eukaryotic Reproduction: – Some asexual, some.

PROTISTA

Analogy:Kitchen junk drawer

Animal-like

Plant-like

In General• Mostly aquatic life• Usually unicellular

– Eukaryotic

• Reproduction: – Some asexual, some sexual,

some both

• Feeding:– Most heterotrophic, some

autotrophic

• Kingdom for life that doesn’t fit in animals, plant or fungi kingdom

• 3 main categories

Fungi-like

• AKA: Protozoans• Heterotrophic: pathogens,

parasites, predators • Classified by how they

move:1) Pseudopods : move w/

pseudopodia (false- feet)– Engulf by phagocytosis– Ex: Amoebas

Animal-Like Protista

http://upload.wikimedia.org/wikipedia/commons/5/58/Amoeba_%28PSF%29.png










2) Flagellates: move w/ flagella– Ex: Trypanosoma causes

sleeping sickness


Vector: tsetse fly

Trypanosoma

Giardia causes diarrhea






sleeping sickness







sleeping sickness3) Ciliates: move w/ cilia

– Ex: Paramecia








– Ex: Paramecia


Rotifers beat their cilia to create a current to draw water into their “mouths”







– Ex: Paramecia


Amoeba (pseudopod) eating Paramecia (ciliates)

The paramecia start to freak out once they start to be digested!

Animal-Like Protista & Disease

• Malaria– Cause: Plasmodium– Vector: mosquitoes– Effects in humans:

Fever, vomiting, coma, death

Plasmodium injected by mosquito bite

Plasmodium develop inside your liver

Plasmodium reproduce inside your RBCs

Plasmodium reenters mosquito when bitten

http://upload.wikimedia.org/wikipedia/commons/0/0b/Trypanosoma_cruzi_crithidia.jpeg

Plant-like Protista• AKA: Algae• Plant-like: Photosynthetic

– No roots, no leaves, usually unicellular

• Classified by their type of cell wall

1) Euglenoids: use flagella to swim– Plant-like: photosynthetic– Animal-like: swim




1) Euglenoids: use flagella to swim– Plant-like: photosynthetic– Animal-like: swim




1) Euglenoids– Plant-like: photosynthetic– Animal-like: swim

2) Dinoflagellates– Most plankton – Basis of aquatic food

chains3) Diatoms

– Glasslike shells– Provide ~ ½ Earth’s O2




1) Euglenoids– Plant-like: photosynthetic– Animal-like: swim

2) Dinoflagellates– Most plankton – Basis of aquatic food

chains3) Diatoms

– Glasslike shells– Provide ~ ½ Earth’s O2

Fungus-like Protista• Decomposers: recycle

nutrients• Mobile at stages of life

cycle– Spores can develop cilia

• Slime Molds: large (~1 meter) single celled mass of cytoplasm– Fungus & animal-like









• Water molds: can be parasitic– Potato blight: disease





• Water molds: can be parasitic– Potato blight: disease

Protista: The Origins of Multicellular Life

• Some protista are…• 1) Single-celled

– Live by themselves• 2) Colonial

– Group of independent acting cells

– No specialized cells• 3) Multicellular

– Cells specialized to be specific jobs

• Importance: Ancestors of multicellular life

Unicellular EuglenaThis is a colony of cells called Volvox

Multicellular Kelp

Kingdom Protista

Animal-like

1. Pseudopods• Move with

false feet

2. Flagellates• Move with

flagella

3. Ciliates• Move with cilia

Plant-like

1. Diatoms• Glass-like

shells

2. Dinoflagellates• Plankton

3. Euglenoids• Move like

animals, autotrophs like plants

Fungus-like

1. Slime molds• Move like

animals, absorb food like fungi

2. Water molds• Often parasites• Responsible

for Irish Potato Famine

ReView• 1) Name the three categories of protista.• 2) Which category of protista has members that are able to

move?• 3) Which category of protista has members that absorb

nutrients?• 4) Which category of protista has members that are

heterotrophs?• 5) Which category of protista has members that hunt?• 6) How does a pseudopod, flagella, and cilia differ?• 7) Name the 3 major categories of protozoa.• 8) Name the 3 major categories of algae.• 9) Name the 2 major categories of fungus-like protista.

Analogy: Kitchen junk drawer Animal-like Plant-like In General Mostly aquatic life Usually unicellular – Eukaryotic Reproduction: – Some asexual, some.

Documents